Zyrtec

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Generic: cetirizine

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Information reviewed July 24, 2026

Rank #8 in NZ TV Ads
Class: Second-Generation Antihistamine

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What is it for?

A widely used antihistamine in New Zealand for hay fever, allergic rhinitis, and hives.

Primary Condition

Hay fever, allergies, hives

How it works

Blocks histamine H1 receptors to reduce allergic symptoms such as sneezing and itching.

Common Side Effects

This is not a complete list of side effects. Always consult with a doctor.

  • Drowsiness
  • Dry mouth
  • Fatigue
  • Headache

Zyrtec FAQs

What is Zyrtec used for?

Zyrtec (cetirizine) is a prescription medication used to treat Hay fever, allergies, hives. A widely used antihistamine in New Zealand for hay fever, allergic rhinitis, and hives.

How does Zyrtec work?

Blocks histamine H1 receptors to reduce allergic symptoms such as sneezing and itching.

What are the common side effects of Zyrtec?

Commonly reported side effects of Zyrtec include Drowsiness, Dry mouth, Fatigue, and Headache. This is not a complete list — tell your doctor or pharmacist about any side effects you experience.

Does Zyrtec have any serious warnings?

Zyrtec does not carry an FDA Boxed Warning, but every prescription medicine has risks and possible interactions. Always follow your doctor's instructions and read the medication guide that comes with it.

What is the generic name for Zyrtec?

The active ingredient in Zyrtec is cetirizine, which belongs to a class of medicines known as Second-Generation Antihistamine.

Who makes Zyrtec?

Zyrtec is manufactured by Johnson & Johnson. It was first approved in 1995.

How can I save money on Zyrtec?

You may be able to lower the cost of Zyrtec by using a free pharmacy discount card or by comparing prices across pharmacies before you fill your prescription. Savings vary by pharmacy and location.

Common questions about Zyrtec

Other Allergy medications

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Quick Facts

Manufacturer

Johnson & Johnson

Year Approved

1995

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